Build failures with lld >=17

[Bernardo Meurer Costa]

It seems like LLVM’s LLD started to enable --no-undefined-version by 
default[1], causing a hard error when building ncurses 6.4[2]:

aarch64-unknown-linux-gnu-ld: error: version script assignment of 
'NCURSES6_TIC_5.0.19991023' to symbol '_nc_check_termtype' failed: symbol not 
defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 
'NCURSES6_TIC_5.0.19991023' to symbol '_nc_resolve_uses' failed: symbol not 
defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 
'NCURSES6_TIC_5.5.20051010' to symbol '_nc_alloc_entry_leaks' failed: symbol 
not defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 
'NCURSES6_TIC_5.5.20051010' to symbol '_nc_captoinfo_leaks' failed: symbol not 
defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 
'NCURSES6_TIC_5.5.20051010' to symbol '_nc_comp_scan_leaks' failed: symbol not 
defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 
'NCURSES6_TIC_5.7.20081102' to symbol '_nc_free_tic' failed: symbol not defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 'local' to 
symbol '_nc_comp_captab_leaks' failed: symbol not defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 'local' to 
symbol '_nc_leaks_tic' failed: symbol not defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 
'NCURSES6_TINFO_5.0.19991023' to symbol '_nc_info_hash_table' failed: symbol 
not defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 
'NCURSES6_TINFO_5.0.19991023' to symbol '_nc_trace_buf' failed: symbol not 
defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 
'NCURSES6_TINFO_5.0.19991023' to symbol '_tracechar' failed: symbol not defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 
'NCURSES6_TINFO_5.0.19991023' to symbol 'trace' failed: symbol not defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 'local' to 
symbol '_nc_cap_hash_table' failed: symbol not defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 'local' to 
symbol '_nc_capalias_table' failed: symbol not defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 'local' to 
symbol '_nc_infoalias_table' failed: symbol not defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 'local' to 
symbol '_nc_key_names' failed: symbol not defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 'local' to 
symbol '_nc_read_termcap_entry' failed: symbol not defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 'local' to 
symbol '_nc_trace_tries' failed: symbol not defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 'local' to 
symbol '_nc_tracebits' failed: symbol not defined
aarch64-unknown-linux-gnu-ld: error: version script assignment of 
'NCURSES6_TINFO_5.1.20000708' to symbol '_nc_utf8_outch' failed: symbol not 
defined
aarch64-unknown-linux-gnu-ld: error: too many errors emitted, stopping now (use 
--error-limit=0 to see all errors)
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[1]: *** [Makefile:986: ../lib/libncursesw.so.6.4] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: Leaving directory '/build/ncurses-6.4/ncurses'
make: *** [Makefile:135: all] Error 2

We've had to work around this in nixpkgs by explicitly allowing undefined 
versions[3].

Cheers,
Bernardo.

[1]: 
https://github.com/llvm/llvm-project/commit/241dbd310599e3c1a0f1b0c9ced14c8b8760539e
[2]: https://github.com/NixOS/nixpkgs/issues/310727
[3]: https://github.com/NixOS/nixpkgs/pull/309887